The TDA2005 IC is classB dual audio power amplifier & specifically designed for car radio application. This circuit designed using this device that provides a high current capability (up to 3.5 A) and very low number of external components. It delivers 20W Rms through 4Ω speaker. Apply heatsink compound coat between IC and heatsink. That can drive very low impedance loads. Install proper heatsink to IC, it generates more heat in effective state.
R1, R2 - 180Ω/0.25W
R3, R4 - 1Ω/0.25W
C1, C5, C7, C8 - 0.1μf (104) Mylar
C2, C9 - 220μf/16V Electrolytic
C3 - 10μf/16V Electrolytic
C4 - 0.01μf (103) Mylar
C6 - 0.1μf (104) Ceramic
SP - 4Ω / 30W or 40W Speaker
Power Source - 12V/2A (Up to 3.5A) DC
Install proper heat-sink to IC.
Oct 10, 2012 ||